Operation As One-Shot Pulse Output - NEC Renesas V850/SC1 User Manual

Remarks 1. 0/1: When these bits are reset to 0 or set to 1, the other functions can be used along with the
square-wave output function.
registers 0, 1, 7 to 12 (TMC0, TMC1, TMC7 to TMC12) and (2) Capture/compare control
registers 0, 1, 7 to 12 (CRC0, CRC1, CRC7 to CRC12).
2. n = 0, 1, 7 to 12
&RXQW FORFN
70Q FRXQW YDOXH
&5Q
,1770Q
72Q SLQ RXWSXW
Remark n = 0, 1, 7 to 12

8.2.6 Operation as one-shot pulse output

TMn can output a one-shot pulse in synchronization with a software trigger and an external trigger (TIn0 pin input).
(1) One-shot pulse output via software trigger
A one-shot pulse can be output from the TOn pin by setting 16-bit timer mode control register n (TMCn),
capture/compare control register n (CRCn), and 16-bit timer output control register n (TOCn) as shown in Figure
8-23, and by setting bit 6 (OSPTn) of TOCn by software.
By setting OSPTn to 1, the 16-bit timer/event counter is cleared and started, and its output is asserted active at
the count value (N) preset to 16-bit capture/compare register n1 (CRn1). After that, the output is deasserted
inactive at the count value (M) preset to 16-bit capture/compare register n0 (CRn0)
Even after the one-shot pulse has been output, TMn continues its operation. To stop TMn, TMCn must be reset
to 00H.
Note This is an example when N < M. When N > M, the output becomes active at the CRn0 value and inactive
at the CRn1 value.
Caution Do not set OSPTn to 1 while the one-shot pulse is being output. To output the one-shot pulse
again, wait until the current one-shot pulse output ends.
Remark n = 0, 1, 7 to 12
286
CHAPTER 8 TIMER/COUNTER FUNCTION
Figure 8-22. Timing of Square-Wave Output Operation
+ + + 1 − 
1
User's Manual U15109EJ3V0UD
For details, refer to 8.1.4 (1) 16-bit timer mode control
1 + + +
1 −  1
+
490
.